[Gllug] Advice on ADSL line attenuation and noise margin

Richard Jones rich at annexia.org
Thu Mar 11 11:04:38 UTC 2010


On Thu, Mar 11, 2010 at 11:02:14AM +0000, Jason Clifford wrote:
> On Thu, 2010-03-11 at 10:58 +0000, Richard Jones wrote:
> > Reading around the issue, it seems like the tiny difference in line
> > attenuation (49 db vs 48 db) may be significant for ADSL 2+?
> 
> They are not significant.
> 
> That you had line sync as shown when it wasn't working shows that the
> problem was nothing to do with attenuation or noise margin.
> 
> Is your connection a C&W LLU one? If so the reason it was down was a
> major service outage in C&W's systems.

murphx.com isn't it?

I am kind of interested in the numbers, what they mean, and how
to improve them anyhow :-)

Rich.

-- 
Richard Jones
Red Hat
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